We also would like to mention that we have slightly modified the Hamiltonian given in [1]}, by treating
higher time derivatives in the action, which are now eliminated by partial integration. This change, however, just
corresponds
to a canonical transformation, as we will show below in calculating observables which come out the same. The complete
Hamiltonian, with tags on different contributions, is given in computer readable form in the ancillary file
HAMILTONIAN.m to this paper.
